I did end up ordered 1/8 spacers, along with the spin doctor lippage system. This is only my 2nd time laying tile, and 1/16 with a 24" tile leaves extremely minimal amount of leeway.
I did use mapei modified ultraflex thinset for subfloor to ditra. Now I have mapei uncoupling thinset for LFTs to use between the ditra and tiles.
I have heard it both ways regardng the factory applied wax. If you remove the way, you run the possible risk of staining the porcelain, (but I will be using a white grout anyway?, also the wax and residual grout haze (i will be cleaning as I go) could be removed all at once.
I do find it funny when I ask about tiling within an RV on non RV specific forums all the alarms start sounding followed by
I dont think many people realize tiles have been done, and are done, and will continue to be done in motorhomes. Im not sure about 5th wheels as trailers need to be kept light, and as a result quite flexible, but a class A is a different story..